Composite type transverse flow fan

ABSTRACT

A composite type transverse flow fan has a driving device and a fan blade module, which is attached to the driving device. The fan blade module further includes at least a rotating shaft, at least a fan blade part and at least a fan frame. The fan blade module further includes at least a rotating shaft, at least a fan blade part and at least a fan frame. The rotating shaft has a first coupling part and a second coupling part and both of the coupling parts detachably engage with each other. The fan blade part is attached to the rotating shaft. The fan frame is attached with the rotating shaft and provides a first joining part and a second joining part and both the joining parts detachably engage with each other. Once the driving device is in operation, the fan blade part is capable of rotates in the fan frame.

BACKGROUND OF THE INVENTION

1. Field of Invention

The present invention is related to a composite type transverse flow fanand particularly to a fan structure with composite fan blades.

2. Brief Description of Related Art

A major function of the current fan is to induce circulating air flow toarticles needed to be cooled. Thus, if the circulating air flow is ableto be increased, effect of heat dissipation for the cooled articles canbe enhanced.

However, in order to promote the circulating air flow, improvements ofthe conventional fan device have been performed and are classified intotwo options: (1) improvement of driving device and (2) improvement offan blades. The improvement of driving device further is divided intotwo ways (a) improvement of rotational speed and (b) improvement ofstabilizing rotation. The improvement of fan blades further is dividedinto two ways (a) improvement of each fan blade and (b) increase ofnumber of the fan blades.

Although the preceding improvements can reach purpose of promotingcirculation of air flow, effects such as simple assembling, expandingheat dissipation area and adjustable number of fan blades for meetingheat dissipation need are not possible to be obtained at the same time.

SUMMARY OF THE INVENION

Accordingly, an object of the present invention is to provide acomposite type transverse air flow fan, which can comply with need ofheat dissipation to adjust number of fan blades.

Another object of the present invention is to provide a composite typetransverse air flow fan, which is capable of being assembled easily.

A further object of the present invention is to provide a composite typetransverse air flow fan, which has an increased area of the heatdissipation.

BRIEF DESCRIPTION OF THE DRAWINGS

The detail structure, the applied principle, the function and theeffectiveness of the present invention can be more fully understood withreference to the following description and accompanying drawings, inwhich:

FIG. 1 is a perspective view of the first embodiment of a composite typetransverse flow fan according to the present invention;

FIG. 2 is an exploded sectional view of the first embodiment of acomposite type transverse flow fan according to the present invention;

FIG. 3 is a perspective view of the second embodiment of a compositetype transverse flow fan according to the present invention;

FIG. 4 is an exploded sectional view of the first embodiment of acomposite type transverse flow fan according to the present invention;

FIG. 5 is perspective view of the third embodiment of a composite typetransverse flow fan according to the present invention; and

FIG. 6 is an exploded sectional view of the first embodiment of acomposite type transverse flow fan according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 and 2, the first embodiment of a composite typetransverse flow fan according to the present invention basicallyincludes a drive device 11, which can be a motor, and a fan blade module12, which is attached to the drive device 11. The fan blade module 12further includes at least one fan blade part 121, at least one fan frame122 and at least one rotating shaft 123. The fan frame 122 has a firstjoining part 122 a and a second joining part 122 b detachably engagingwith each other. The rotating shaft 123 has a first coupling part 123 aand a second coupling part 123 b detachably engaging with each other.The fan blade part 121 has a projection 121 a with a pivot hole 121 b atthe center thereof. The pivot hole 121 b fits with the rotating shaft123 with a bearing 123 c and a bearing 123 d provided between the pivothole 121 and the rotating shaft 123. The bearings 123 c and 123 d allowthe rotating shaft 123 rotationally contacting with the fan frame 122such that the fan blade part 121 rotates in the fan frame 122 when therotating device 11 turns.

For assembling, a driving shaft 111 of the driving device 11 has areceiving hole 111 a and the first coupling part 123 a has a fittinghole 123 e with a chamber 123 f. The chamber 123 f has an open side 123g with a stopper 123 h and a lateral side of the chamber 123 f oppositeto the open side 123 g has a fixing hole 123 i for securing a fixingmember 123 j. A ball 123 k and an elastic member 123 m are received inthe chamber 123 f sequentially and then the fixing member 123 j isfixedly joined to the fixing hole to urge the ball 123 k pressingagainst the stopper 123 h. Once the driving shaft 111 fits with thefitting hole 123 e, the ball 123 k is pressed with the driving shaft 111against the elastic member 123 m such that the elastic member 123 m iscompressed along with the ball 123 k moving inward till the drivingshaft 111 being incapable of pressing the ball 123 k. Right at the time,the driving shaft 111 keeps moving downward till the receiving hole 111a moving to a position being able to receive the ball 123 k. Under thiscircumstance, the ball 123 k is pushed by the bouncing back force of theelastic member 123 m to move outward the open side 123 g of the chamber123 f and enter the receiving hole 111 a such that the driving shaft 123can fits with the fitting hole 123 e.

Besides, the driving device 11 provides a receiving part 111 b with aprojection 111 c and the first joining part 122 a has another projection122 f to engage with the projection 111 c such that the receiving part111 b and the first joining part 122 a can be joined to each other. Thesecond joining part 122 h has a further projection 122 g too.

When the driving device 11 is in operation, the fan blade part 121 ofthe fan blade module 12 rotates at state A to induce circulation airflow entering via an inlet 122 h and leaving via an outlet provided atthe fan frame 122.

Referring to FIGS. 3 and 4, the second embodiment of a composite typetransverse fan according to the present invention is illustrated. Thefan frame 222 has a first joining part 222 a and a second joining part222 b detachably engaging with each other. The rotating shaft 223 has afirst coupling part 223 a and a second coupling part 223 b detachablyengaging with each other. The fan blade part 221 has a projection 221 awith a pivot hole 221 b at the center thereof. The pivot hole 221 b fitswith the rotating shaft 223 with a bearing 223 c and a bearing 223 dprovided between the fan frame 222 and the rotating shaft 223. Thebearings 223 c and 223 d allow the rotating shaft 223 rotationallycontacting with the fan frame 222.

For assembling, the second coupling part 123 b has a receiving hole 123n and the first coupling part 223 a has a fitting hole 223 e with achamber 223 f. The chamber 223 f has an open side 223 g with a stopper223 h and a lateral side of the chamber 223 f opposite to the open side223 g has a fixing hole 223 i for securing a fixing member 223 j. A ball223 k and an elastic member 223 m are received in the chamber 123 fsequentially and then the fixing member 223 j is fixedly joined to thefixing hole 223 i to urge the ball 223 k pressing against the stopper223 h. Once the second coupling part 123 b fits with the fitting hole223 e, the ball 223 k is pressed with the second coupling 123 b againstthe elastic member 223 m such that the elastic member 223 m iscompressed along with the ball 223 k moving inward till the secondcoupling part 123 b being incapable of pressing the ball 223 k. Right atthe time, the second coupling part 123 b keeps moving downward till thereceiving hole 123 h moving to a position being able to receive the ball223 k. Under this circumstance, the ball 223 k is pushed by the bouncingback force of the elastic member 223 m to move outward the open side 223g of the chamber 223 f and enter the receiving hole 123 n such that thesecond coupling part 223 can fits with the fitting hole 223 e.

Besides, the second joining part 122 b provides a projection 122 g andthe first joining part 222 a has another projection 122 f to engage withthe projection 122 g such that the second joining part 222 b and thefirst joining part 122 a can be joined to each other. The second joiningpart 222 b has a further projection 122 g too. Hence, another fan blademodule can be obtained.

When the driving device 11 is in operation, the fan blade parts (121,221) of the fan blade module 22 rotate to induce circulation air flowentering via an inlet (122 h, 222 h) and leaving via an outlet providedat the fan frame (122, 222).

Referring to FIGS. 5 and 6, the third embodiment of a composite typetransverse fan according to the present invention is illustrated. It canbe seen that the composite type transverse flow fan of presentembodiment is composed of two sets of the second embodiment of thepresent invention in parallel such that the cooling area can beincreased radially and axially.

While the invention has been described with referencing to the preferredembodiments thereof, it is to be understood that modifications orvariations may be easily made without departing from the spirit of thisinvention, which is defined by the appended claims.

1. A composite type transverse flow fan, comprising: a driving device;and a fan blade module, being attached to the driving device; whereinthe fan blade module further comprises at least a rotating shaft,providing a first coupling part and a second coupling part and both ofthe coupling parts detachably engaging with each other; at least a fanblade part, being attached to the rotating shaft; and at least a fanframe, being attached with the rotating shaft and providing a firstjoining part and a second joining part and both the joining partsdetachably engaging with each other. whereby, once the driving device isin operation, the fan blade part is capable of rotates in the fan frame.2. The composite type transverse flow fan as defined in claim 1,wherein, the driving device is a motor.
 3. The composite type transverseflow fan as defined in claim 1, wherein, the fan blade part has aprojection at the center thereof.
 4. The composite type transverse flowfan as defined in claim 1, wherein, bearings are disposed between therotating shaft and the fan frame.